Refactored the PCRE2 extension plus adding some regex examples using this extension. (0.41.7)

examples/extensions/pcre2/pcre2_test.fun

@@ -0,0 +1,29 @@
+#!/usr/bin/env fun
+
+/*
+ * This file is part of the Fun programming language.
+ * https://fun-lang.xyz/
+ *
+ * Copyright 2026 Johannes Findeisen <you@hanez.org>
+ * Licensed under the terms of the Apache-2.0 license.
+ * https://opensource.org/license/apache-2-0
+ *
+ * Added: 2026-05-07
+ */
+
+// Minimal example showing only the pcre2_test opcode
+// Requires building Fun with -DFUN_WITH_PCRE2=ON
+
+pattern = "^hello$"
+text = "Hello"  // mismatches unless case-insensitive is set
+
+// Flags: 1=I (ignore case), 2=M, 4=S, 8=U (UTF), 16=X
+flags = 1  // make it case-insensitive so it matches
+
+print("pcre2_test example:")
+print(pcre2_test(pattern, text, flags))  // prints 1 on match, 0 otherwise
+
+/* Expected output:
+pcre2_test example:
+1
+*/